Benefits of Submersible Liquid Level Sensors


When selecting a liquid level sensor for your application, is it important to not only look at the materials of construction for the liquid level sensor but also the operation and technology the liquid level sensor utilizes. In many applications, the liquid may produce a vapor blanket this makes it difficult to utilize a liquid level sensor that uses ultrasonic non-contact technology. In others, the specific gravity may change which will make it very difficult to utilizes a liquid level sensor with hydrostatic technology. Other factors such as foam, turbulence, condensation and viscosity will influence the selection of the liquid level sensor as well. Tank height and capacity will come into play while selecting the correct liquid level sensor as well.


Most liquid level sensors will be utilized for continuously monitoring the liquid level within a holding tank, somethings a pit or sump. The liquid level sensor will be mounted into a threaded flange or bulkhead fitting and either inserted into the media or will monitor without encountering the media. If the liquid level sensor is utilizing ultrasonic non-contact technology the operator must be aware of the condition of his media internally, making sure no factors that affect an ultrasonic liquid level sensor are present. This includes foam, vapor, turbulence, condensation, and splashing. An ultrasonic liquid level sensor also has a dead band which refers to the blanking distance from the transducer that nothing can be within or the sensor will become lost. If the ultrasonic liquid level sensor becomes lost the operator will lose the signal from the liquid level sensor to their PLC or remote display. In small tanks the dead band may cause issues as the operator will not be able to use a liquid level sensor to monitor the complete tank. This is common in drums and totes, in these cases operators should consider an alternative liquid level sensor.


A great alternative for a small tank liquid level sensor is a submersible liquid level sensor that the operator would simply drop into the tank and it would continuously monitor the head pressure on a diaphragm. With a submersible liquid level sensor, the operator would have to know the specific gravity of the liquid they are trying to monitor in order to receive accurate readings. Level Pro’s 100 Series Submersible Level Sensor is offered in thermoplastic, designed for aggressive chemical applications. The nice thing about a thermoplastic liquid level sensor is that the operator can implement using it for chemical or non-corrosive applications. A liquid level sensor that utilizes head pressure to monitor the level continuously will not be influenced by the same factors that will throw off an ultrasonic non-contact liquid level sensor. What sets Level Pro aside from the competition, is that they supply a liquid level sensor constructed completely from corrosion resistant materials. This includes the cable which is FEP Teflon coated, and the O-rings which are KALREZ. Now you have the ability to utilize a liquid level sensor in any application with choosing the Level Pro non-contact ultrasonic liquid level sensor or the submersible liquid level sensor.

Check out Level Pro’s complete line of Submersible Liquid Level Sensors here!

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